Electricity and Earth

see attached instructions – answering only ONE question on attachment – you may choose – due Oct 24

“Electricity and Earth’s Magnetic Field” Please respond to the following:

please select ONE of the two questions to answer. (using websites below – referencing the website)

· Describe how an electric current is generated and transported. Assess the current state of our national grid in the United States, as well as any challenges in updating this grid.

· From the first and second e-Activities, describe how the Earth’s magnetic field is generated, and how it has changed throughout Earth’s history. Analyze how a magnetic reversal might impact human activities on Earth.

eActivities

· Read the article titled “Lost in Migration: Earth’s Magnetic Field Overdue a Flip” located at

http://www.reuters.com/article/2012/10/03/us-science-earth-magneticfield-idUSBRE8920X620121003

. Be prepared to discuss.

· Read the article titled “Earth’s Inconstant Magnetic Field” located at

http://www.nasa.gov/vision/earth/lookingatearth/29dec_magneticfield.html

. Be prepared to discuss.